1. (a) Work practice:

   1. (1) use closed, non-leaking containers to store or dispose of cloth or other absorbent cleaning tools impregnated with industrial cleaning solvents when not in use;
   2. (2) minimize air circulation around cleaning operations;
   3. (3) properly dispose of used cleaning solvents and tools;
   4. (4) implement equipment practices that minimize emissions, such as maintaining of cleaning equipment and repair of solvent leaks; and
2. (b) an industrial cleaning solvent with a maximum VOC content of 50 grams of VOC per liter (0.42 pound of VOC per gallon) of cleaning material must be used for cleaning the following: large and small manufactured components, parts, equipment, floors, tanks, and vessels; or
3. (c) as an alternative to the maximum VOC content specified above, an industrial cleaning solvent with a maximum composite vapor pressure of eight millimeters of mercury (mmHg) at 20 degrees Celsius may also be used; or
4. (d) emissions are controlled by an emission control system with an overall control efficiency of at least 85 percent or equivalent control.

The owner or operator of a facility subject to this Subpart shall not conduct any cleaning, with industrial cleaning solvents containing VOC’s, unless the following control measures are used: